common/usb_kbd.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Part of this source has been derived from the Linux USB
   6  * project.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  *
  26  */
  27 #include <common.h>
  28 #include <devices.h>
  29
  30 #ifdef CONFIG_USB_KEYBOARD
  31
  32 #include <usb.h>
  33
  34 #undef USB_KBD_DEBUG
  35 /*
  36  * if overwrite_console returns 1, the stdin, stderr and stdout
  37  * are switched to the serial port, else the settings in the
  38  * environment are used
  39  */
  40 #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
  41 extern int overwrite_console (void);
  42 #else
  43 int overwrite_console (void)
  44 {
  45         return (0);
  46 }
  47 #endif
  48
  49 #ifdef  USB_KBD_DEBUG
  50 #define USB_KBD_PRINTF(fmt,args...)     printf (fmt ,##args)
  51 #else
  52 #define USB_KBD_PRINTF(fmt,args...)
  53 #endif
  54
  55
  56 #define REPEAT_RATE  40/4 /* 40msec -> 25cps */
  57 #define REPEAT_DELAY 10 /* 10 x REAPEAT_RATE = 400msec */
  58
  59 #define NUM_LOCK        0x53
  60 #define CAPS_LOCK 0x39
  61 #define SCROLL_LOCK 0x47
  62
  63
  64 /* Modifier bits */
  65 #define LEFT_CNTR               0
  66 #define LEFT_SHIFT      1
  67 #define LEFT_ALT                2
  68 #define LEFT_GUI                3
  69 #define RIGHT_CNTR      4
  70 #define RIGHT_SHIFT     5
  71 #define RIGHT_ALT               6
  72 #define RIGHT_GUI               7
  73
  74 #define USB_KBD_BUFFER_LEN 0x20  /* size of the keyboardbuffer */
  75
  76 static volatile char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
  77 static volatile int usb_in_pointer = 0;
  78 static volatile int usb_out_pointer = 0;
  79
  80 unsigned char new[8];
  81 unsigned char old[8];
  82 int repeat_delay;
  83 #define DEVNAME "usbkbd"
  84 static unsigned char num_lock = 0;
  85 static unsigned char caps_lock = 0;
  86 static unsigned char scroll_lock = 0;
  87
  88 static unsigned char leds __attribute__ ((aligned (0x4)));
  89
  90 static unsigned char usb_kbd_numkey[] = {
  91          '1', '2', '3', '4', '5', '6', '7', '8', '9', '0','\r',0x1b,'\b','\t',' ', '-',
  92          '=', '[', ']','\\', '#', ';', '\'', '`', ',', '.', '/'
  93 };
  94 static unsigned char usb_kbd_numkey_shifted[] = {
  95          '!', '@', '#', '$', '%', '^', '&', '*', '(', ')','\r',0x1b,'\b','\t',' ', '_',
  96          '+', '{', '}', '|', '~', ':', '"', '~', '<', '>', '?'
  97 };
  98
  99 /******************************************************************
 100  * Queue handling
 101  ******************************************************************/
 102 /* puts character in the queue and sets up the in and out pointer */
 103 static void usb_kbd_put_queue(char data)
 104 {
 105         if((usb_in_pointer+1)==USB_KBD_BUFFER_LEN) {
 106                 if(usb_out_pointer==0) {
 107                         return; /* buffer full */
 108                 } else{
 109                         usb_in_pointer=0;
 110                 }
 111         } else {
 112                 if((usb_in_pointer+1)==usb_out_pointer)
 113                         return; /* buffer full */
 114                 usb_in_pointer++;
 115         }
 116         usb_kbd_buffer[usb_in_pointer]=data;
 117         return;
 118 }
 119
 120 /* test if a character is in the queue */
 121 static int usb_kbd_testc(void)
 122 {
 123         if(usb_in_pointer==usb_out_pointer)
 124                 return(0); /* no data */
 125         else
 126                 return(1);
 127 }
 128 /* gets the character from the queue */
 129 static int usb_kbd_getc(void)
 130 {
 131         char c;
 132         while(usb_in_pointer==usb_out_pointer) {
 133 #ifdef CFG_USB_EVENT_POLL
 134                 usb_event_poll();
 135 #endif
 136         }
 137         if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
 138                 usb_out_pointer=0;
 139         else
 140                 usb_out_pointer++;
 141         c=usb_kbd_buffer[usb_out_pointer];
 142         return (int)c;
 143
 144 }
 145
 146 /* forward decleration */
 147 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);
 148
 149 /* search for keyboard and register it if found */
 150 int drv_usb_kbd_init(void)
 151 {
 152         int error,i,index;
 153         device_t usb_kbd_dev,*old_dev;
 154         struct usb_device *dev;
 155         char *stdinname  = getenv ("stdin");
 156
 157         usb_in_pointer=0;
 158         usb_out_pointer=0;
 159         /* scan all USB Devices */
 160         for(i=0;i<USB_MAX_DEVICE;i++) {
 161                 dev=usb_get_dev_index(i); /* get device */
 162                 if(dev->devnum!=-1) {
 163                         if(usb_kbd_probe(dev,0)==1) { /* Ok, we found a keyboard */
 164                                 /* check, if it is already registered */
 165                                 USB_KBD_PRINTF("USB KBD found set up device.\n");
 166                                 for (index=1; index<=ListNumItems(devlist); index++) {
 167                                         old_dev = ListGetPtrToItem(devlist, index);
 168                                         if(strcmp(old_dev->name,DEVNAME)==0) {
 169                                                 /* ok, already registered, just return ok */
 170                                                 USB_KBD_PRINTF("USB KBD is already registered.\n");
 171                                                 return 1;
 172                                         }
 173                                 }
 174                                 /* register the keyboard */
 175                                 USB_KBD_PRINTF("USB KBD register.\n");
 176                                 memset (&usb_kbd_dev, 0, sizeof(device_t));
 177                                 strcpy(usb_kbd_dev.name, DEVNAME);
 178                                 usb_kbd_dev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
 179                                 usb_kbd_dev.putc = NULL;
 180                                 usb_kbd_dev.puts = NULL;
 181                                 usb_kbd_dev.getc = usb_kbd_getc;
 182                                 usb_kbd_dev.tstc = usb_kbd_testc;
 183                                 error = device_register (&usb_kbd_dev);
 184                                 if(error==0) {
 185                                         /* check if this is the standard input device */
 186                                         if(strcmp(stdinname,DEVNAME)==0) {
 187                                                 /* reassign the console */
 188                                                 if(overwrite_console()) {
 189                                                         return 1;
 190                                                 }
 191                                                 error=console_assign(stdin,DEVNAME);
 192                                                 if(error==0)
 193                                                         return 1;
 194                                                 else
 195                                                         return error;
 196                                         }
 197                                         return 1;
 198                                 }
 199                                 return error;
 200                         }
 201                 }
 202         }
 203         /* no USB Keyboard found */
 204         return -1;
 205 }
 206
 207
 208 /* deregistering the keyboard */
 209 int usb_kbd_deregister(void)
 210 {
 211         return device_deregister(DEVNAME);
 212 }
 213
 214 /**************************************************************************
 215  * Low Level drivers
 216  */
 217
 218 /* set the LEDs. Since this is used in the irq routine, the control job
 219    is issued with a timeout of 0. This means, that the job is queued without
 220    waiting for job completion */
 221
 222 static void usb_kbd_setled(struct usb_device *dev)
 223 {
 224         struct usb_interface_descriptor *iface;
 225         iface = &dev->config.if_desc[0];
 226         leds=0;
 227         if(scroll_lock!=0)
 228                 leds|=1;
 229         leds<<=1;
 230         if(caps_lock!=0)
 231                 leds|=1;
 232         leds<<=1;
 233         if(num_lock!=0)
 234                 leds|=1;
 235         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 236                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 237                 0x200, iface->bInterfaceNumber,(void *)&leds, 1, 0);
 238
 239 }
 240
 241
 242 #define CAPITAL_MASK 0x20
 243 /* Translate the scancode in ASCII */
 244 static int usb_kbd_translate(unsigned char scancode,unsigned char modifier,int pressed)
 245 {
 246         unsigned char keycode;
 247
 248         if(pressed==0) {
 249                 /* key released */
 250                 repeat_delay=0;
 251                 return 0;
 252         }
 253         if(pressed==2) {
 254                 repeat_delay++;
 255                 if(repeat_delay<REPEAT_DELAY)
 256                         return 0;
 257                 repeat_delay=REPEAT_DELAY;
 258         }
 259         keycode=0;
 260         if((scancode>3) && (scancode<0x1d)) { /* alpha numeric values */
 261                 keycode=scancode-4 + 0x61;
 262                 if(caps_lock)
 263                         keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 264                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0)) {
 265                         if(keycode & CAPITAL_MASK)
 266                                 keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 267                         else
 268                                 keycode|=CAPITAL_MASK; /* switch to non capital Letters */
 269                 }
 270         }
 271         if((scancode>0x1d) && (scancode<0x3A)) {
 272                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0))  /* shifted */
 273                         keycode=usb_kbd_numkey_shifted[scancode-0x1e];
 274                 else /* non shifted */
 275                         keycode=usb_kbd_numkey[scancode-0x1e];
 276         }
 277         if(pressed==1) {
 278                 if(scancode==NUM_LOCK) {
 279                         num_lock=~num_lock;
 280                         return 1;
 281                 }
 282                 if(scancode==CAPS_LOCK) {
 283                         caps_lock=~caps_lock;
 284                         return 1;
 285                 }
 286                 if(scancode==SCROLL_LOCK) {
 287                         scroll_lock=~scroll_lock;
 288                         return 1;
 289                 }
 290         }
 291         if(keycode!=0) {
 292                 USB_KBD_PRINTF("%c",keycode);
 293                 usb_kbd_put_queue(keycode);
 294         }
 295         return 0;
 296 }
 297
 298 /* Interrupt service routine */
 299 static int usb_kbd_irq(struct usb_device *dev)
 300 {
 301         int i,res;
 302
 303         if((dev->irq_status!=0)||(dev->irq_act_len!=8))
 304         {
 305                 USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",dev->irq_status,dev->irq_act_len);
 306                 return 1;
 307         }
 308         res=0;
 309         for (i = 2; i < 8; i++) {
 310                 if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8]) {
 311                         res|=usb_kbd_translate(old[i],new[0],0);
 312                 }
 313                 if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8]) {
 314                         res|=usb_kbd_translate(new[i],new[0],1);
 315                 }
 316         }
 317         if((new[2]>3) && (old[2]==new[2])) /* still pressed */
 318                 res|=usb_kbd_translate(new[2],new[0],2);
 319         if(res==1)
 320                 usb_kbd_setled(dev);
 321         memcpy(&old[0],&new[0], 8);
 322         return 1; /* install IRQ Handler again */
 323 }
 324
 325 /* probes the USB device dev for keyboard type */
 326 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 327 {
 328         struct usb_interface_descriptor *iface;
 329         struct usb_endpoint_descriptor *ep;
 330         int pipe,maxp;
 331
 332         if (dev->descriptor.bNumConfigurations != 1) return 0;
 333         iface = &dev->config.if_desc[ifnum];
 334
 335         if (iface->bInterfaceClass != 3) return 0;
 336         if (iface->bInterfaceSubClass != 1) return 0;
 337         if (iface->bInterfaceProtocol != 1) return 0;
 338         if (iface->bNumEndpoints != 1) return 0;
 339
 340         ep = &iface->ep_desc[0];
 341
 342         if (!(ep->bEndpointAddress & 0x80)) return 0;
 343         if ((ep->bmAttributes & 3) != 3) return 0;
 344         USB_KBD_PRINTF("USB KBD found set protocol...\n");
 345         /* ok, we found a USB Keyboard, install it */
 346         /* usb_kbd_get_hid_desc(dev); */
 347         usb_set_protocol(dev, iface->bInterfaceNumber, 0);
 348         USB_KBD_PRINTF("USB KBD found set idle...\n");
 349         usb_set_idle(dev, iface->bInterfaceNumber, REPEAT_RATE, 0);
 350         memset(&new[0], 0, 8);
 351         memset(&old[0], 0, 8);
 352         repeat_delay=0;
 353         pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 354         maxp = usb_maxpacket(dev, pipe);
 355         dev->irq_handle=usb_kbd_irq;
 356         USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
 357         usb_submit_int_msg(dev,pipe,&new[0], maxp > 8 ? 8 : maxp,ep->bInterval);
 358         return 1;
 359 }
 360
 361
 362 #if 0
 363 struct usb_hid_descriptor {
 364         unsigned char  bLength;
 365         unsigned char  bDescriptorType; /* 0x21 for HID */
 366         unsigned short bcdHID; /* release number */
 367         unsigned char  bCountryCode;
 368         unsigned char  bNumDescriptors;
 369         unsigned char  bReportDescriptorType;
 370         unsigned short wDescriptorLength;
 371 } __attribute__ ((packed));
 372
 373 /*
 374  * We parse each description item into this structure. Short items data
 375  * values are expanded to 32-bit signed int, long items contain a pointer
 376  * into the data area.
 377  */
 378
 379 struct hid_item {
 380         unsigned char format;
 381         unsigned char size;
 382         unsigned char type;
 383         unsigned char tag;
 384         union {
 385             unsigned char   u8;
 386             char            s8;
 387             unsigned short  u16;
 388             short           s16;
 389             unsigned long   u32;
 390             long            s32;
 391             unsigned char  *longdata;
 392         } data;
 393 };
 394
 395 /*
 396  * HID report item format
 397  */
 398
 399 #define HID_ITEM_FORMAT_SHORT   0
 400 #define HID_ITEM_FORMAT_LONG    1
 401
 402 /*
 403  * Special tag indicating long items
 404  */
 405
 406 #define HID_ITEM_TAG_LONG       15
 407
 408
 409 static struct usb_hid_descriptor usb_kbd_hid_desc;
 410
 411 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
 412 {
 413         printf("USB_HID_DESC:\n");
 414         printf("  bLenght               0x%x\n",hid->bLength);
 415         printf("  bcdHID                0x%x\n",hid->bcdHID);
 416         printf("  bCountryCode          %d\n",hid->bCountryCode);
 417         printf("  bNumDescriptors       0x%x\n",hid->bNumDescriptors);
 418         printf("  bReportDescriptorType 0x%x\n",hid->bReportDescriptorType);
 419         printf("  wDescriptorLength     0x%x\n",hid->wDescriptorLength);
 420 }
 421
 422
 423 /*
 424  * Fetch a report description item from the data stream. We support long
 425  * items, though they are not used yet.
 426  */
 427
 428 static int fetch_item(unsigned char *start,unsigned char *end, struct hid_item *item)
 429 {
 430         if((end - start) > 0) {
 431                 unsigned char b = *start++;
 432                 item->type = (b >> 2) & 3;
 433                 item->tag  = (b >> 4) & 15;
 434                 if (item->tag == HID_ITEM_TAG_LONG) {
 435                         item->format = HID_ITEM_FORMAT_LONG;
 436                         if ((end - start) >= 2) {
 437                                 item->size = *start++;
 438                                 item->tag  = *start++;
 439                                 if ((end - start) >= item->size) {
 440                                         item->data.longdata = start;
 441                                         start += item->size;
 442                                         return item->size;
 443                                 }
 444                         }
 445                 } else {
 446                         item->format = HID_ITEM_FORMAT_SHORT;
 447                         item->size = b & 3;
 448                         switch (item->size) {
 449                                 case 0:
 450                                         return item->size;
 451                                 case 1:
 452                                         if ((end - start) >= 1) {
 453                                                 item->data.u8 = *start++;
 454                                                 return item->size;
 455                                         }
 456                                         break;
 457                                 case 2:
 458                                         if ((end - start) >= 2) {
 459                                                 item->data.u16 = swap_16((unsigned short *)start);
 460                                                 start+=2;
 461                                                 return item->size;
 462                                         }
 463                                 case 3:
 464                                         item->size++;
 465                                         if ((end - start) >= 4) {
 466                                                 item->data.u32 = swap_32((unsigned long *)start);
 467                                                 start+=4;
 468                                                 return item->size;
 469                                         }
 470                         }
 471                 }
 472         }
 473         return -1;
 474 }
 475
 476 /*
 477  * HID report descriptor item type (prefix bit 2,3)
 478  */
 479
 480 #define HID_ITEM_TYPE_MAIN              0
 481 #define HID_ITEM_TYPE_GLOBAL            1
 482 #define HID_ITEM_TYPE_LOCAL             2
 483 #define HID_ITEM_TYPE_RESERVED          3
 484 /*
 485  * HID report descriptor main item tags
 486  */
 487
 488 #define HID_MAIN_ITEM_TAG_INPUT                 8
 489 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 490 #define HID_MAIN_ITEM_TAG_FEATURE               11
 491 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 492 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 493 /*
 494  * HID report descriptor main item contents
 495  */
 496
 497 #define HID_MAIN_ITEM_CONSTANT          0x001
 498 #define HID_MAIN_ITEM_VARIABLE          0x002
 499 #define HID_MAIN_ITEM_RELATIVE          0x004
 500 #define HID_MAIN_ITEM_WRAP              0x008
 501 #define HID_MAIN_ITEM_NONLINEAR         0x010
 502 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 503 #define HID_MAIN_ITEM_NULL_STATE        0x040
 504 #define HID_MAIN_ITEM_VOLATILE          0x080
 505 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 506
 507 /*
 508  * HID report descriptor collection item types
 509  */
 510
 511 #define HID_COLLECTION_PHYSICAL         0
 512 #define HID_COLLECTION_APPLICATION      1
 513 #define HID_COLLECTION_LOGICAL          2
 514 /*
 515  * HID report descriptor global item tags
 516  */
 517
 518 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 519 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 520 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 521 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 522 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 523 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 524 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 525 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 526 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 527 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 528 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 529 #define HID_GLOBAL_ITEM_TAG_POP                 11
 530
 531 /*
 532  * HID report descriptor local item tags
 533  */
 534
 535 #define HID_LOCAL_ITEM_TAG_USAGE                0
 536 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 537 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 538 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 539 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 540 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 541 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 542 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 543 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 544 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 545
 546
 547 static void usb_kbd_show_item(struct hid_item *item)
 548 {
 549         switch(item->type) {
 550                 case HID_ITEM_TYPE_MAIN:
 551                         switch(item->tag) {
 552                                 case HID_MAIN_ITEM_TAG_INPUT:
 553                                         printf("Main Input");
 554                                         break;
 555                                 case HID_MAIN_ITEM_TAG_OUTPUT:
 556                                         printf("Main Output");
 557                                         break;
 558                                 case HID_MAIN_ITEM_TAG_FEATURE:
 559                                         printf("Main Feature");
 560                                         break;
 561                                 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 562                                         printf("Main Begin Collection");
 563                                         break;
 564                                 case HID_MAIN_ITEM_TAG_END_COLLECTION:
 565                                         printf("Main End Collection");
 566                                         break;
 567                                 default:
 568                                         printf("Main reserved %d",item->tag);
 569                                         break;
 570                         }
 571                         break;
 572                 case HID_ITEM_TYPE_GLOBAL:
 573                         switch(item->tag) {
 574                                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 575                                         printf("- Global Usage Page");
 576                                         break;
 577                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 578                                         printf("- Global Logical Minimum");
 579                                         break;
 580                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 581                                         printf("- Global Logical Maximum");
 582                                         break;
 583                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 584                                         printf("- Global physical Minimum");
 585                                         break;
 586                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 587                                         printf("- Global physical Maximum");
 588                                         break;
 589                                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 590                                         printf("- Global Unit Exponent");
 591                                         break;
 592                                 case HID_GLOBAL_ITEM_TAG_UNIT:
 593                                         printf("- Global Unit");
 594                                         break;
 595                                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 596                                         printf("- Global Report Size");
 597                                         break;
 598                                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 599                                         printf("- Global Report ID");
 600                                         break;
 601                                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 602                                         printf("- Global Report Count");
 603                                         break;
 604                                 case HID_GLOBAL_ITEM_TAG_PUSH:
 605                                         printf("- Global Push");
 606                                         break;
 607                                 case HID_GLOBAL_ITEM_TAG_POP:
 608                                         printf("- Global Pop");
 609                                         break;
 610                                 default:
 611                                         printf("- Global reserved %d",item->tag);
 612                                         break;
 613                         }
 614                         break;
 615                 case HID_ITEM_TYPE_LOCAL:
 616                         switch(item->tag) {
 617                                 case HID_LOCAL_ITEM_TAG_USAGE:
 618                                         printf("-- Local Usage");
 619                                         break;
 620                                 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 621                                         printf("-- Local Usage Minimum");
 622                                         break;
 623                                 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 624                                         printf("-- Local Usage Maximum");
 625                                         break;
 626                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
 627                                         printf("-- Local Designator Index");
 628                                         break;
 629                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
 630                                         printf("-- Local Designator Minimum");
 631                                         break;
 632                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
 633                                         printf("-- Local Designator Maximum");
 634                                         break;
 635                                 case HID_LOCAL_ITEM_TAG_STRING_INDEX:
 636                                         printf("-- Local String Index");
 637                                         break;
 638                                 case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
 639                                         printf("-- Local String Minimum");
 640                                         break;
 641                                 case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
 642                                         printf("-- Local String Maximum");
 643                                         break;
 644                                 case HID_LOCAL_ITEM_TAG_DELIMITER:
 645                                         printf("-- Local Delimiter");
 646                                         break;
 647                                 default:
 648                                         printf("-- Local reserved %d",item->tag);
 649                                         break;
 650                         }
 651                         break;
 652                 default:
 653                         printf("--- reserved %d",item->type);
 654                         break;
 655         }
 656         switch(item->size) {
 657                 case 1:
 658                         printf("  %d",item->data.u8);
 659                         break;
 660                 case 2:
 661                         printf("  %d",item->data.u16);
 662                         break;
 663                 case 4:
 664                         printf("  %ld",item->data.u32);
 665                         break;
 666         }
 667         printf("\n");
 668 }
 669
 670
 671 static int usb_kbd_get_hid_desc(struct usb_device *dev)
 672 {
 673         unsigned char buffer[256];
 674         struct usb_descriptor_header *head;
 675         struct usb_config_descriptor *config;
 676         int index,len,i;
 677         unsigned char *start, *end;
 678         struct hid_item item;
 679
 680         if(usb_get_configuration_no(dev,&buffer[0],0)==-1)
 681                 return -1;
 682         head =(struct usb_descriptor_header *)&buffer[0];
 683         if(head->bDescriptorType!=USB_DT_CONFIG) {
 684                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
 685                 return -1;
 686         }
 687         index=head->bLength;
 688         config=(struct usb_config_descriptor *)&buffer[0];
 689         len=swap_16(config->wTotalLength);
 690         /* Ok the first entry must be a configuration entry, now process the others */
 691         head=(struct usb_descriptor_header *)&buffer[index];
 692         while(index+1 < len) {
 693                 if(head->bDescriptorType==USB_DT_HID) {
 694                         printf("HID desc found\n");
 695                         memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
 696                         usb_kbd_hid_desc.bcdHID=swap_16(usb_kbd_hid_desc.bcdHID);
 697                         usb_kbd_hid_desc.wDescriptorLength=swap_16(usb_kbd_hid_desc.wDescriptorLength);
 698                         usb_kbd_display_hid(&usb_kbd_hid_desc);
 699                         len=0;
 700                         break;
 701                 }
 702                 index+=head->bLength;
 703                 head=(struct usb_descriptor_header *)&buffer[index];
 704         }
 705         if(len>0)
 706                 return -1;
 707         len=usb_kbd_hid_desc.wDescriptorLength;
 708         if((index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0], len)) < 0) {
 709                 printf("reading report descriptor failed\n");
 710                 return -1;
 711         }
 712         printf(" report descriptor (size %u, read %d)\n", len, index);
 713         start=&buffer[0];
 714         end=&buffer[len];
 715         i=0;
 716         do {
 717                 index=fetch_item(start,end,&item);
 718                 i+=index;
 719                 i++;
 720                 if(index>=0)
 721                         usb_kbd_show_item(&item);
 722
 723                 start+=index;
 724                 start++;
 725         } while(index>=0);
 726
 727 }
 728
 729
 730 #endif
 731
 732 #endif /* CONFIG_USB_KEYBOARD */